Means for hydraulically operating valves and cocks.



PATENTED JUNE 11 1907.

W. J. MOGARROLL.

MEANS FOR HYDRAULIGALLY OPERATING VALVES AND COOKS.

APPLIOATION FILED AUG. 17, 1906.

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UNITED STATES PATENT ()FFIGE.

IVILLIAM J. MCOARROLL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO BURNHAM, WILLIAMS & (10., OF PHILADELPHIA, PENNSYLVANIA, A

FIRM.

MEANS FOR HYDRAULICALLY OPERATING VALVES AND COCKS- Specification ofLetters Patent.

Patented June 1 1, 1 907.

Application filed August 17,1906. Serial No. 330,953.

To (all whom it may concern;

Be it known that I, IViLLLiM J MCCAR- ROLL, a citizen of the UnitedStates, and a resident of the city and county of Philadelphia, State ofPennsylvania, have invented certain new and useful Improvements in Meansfor Hydraulically Operating Valves or Cocks, of which the following is aspeciiica tion.

My invention relates to improvements in means for hydraulicallyoperating valves or cocks, and more particularly to improvements inmeans for operating the drain cocks of locomotive cylinders.

I Icreto'fore the drain cocks of locomotive cylinders have been operatedeither through system of levers and rods operated from the cab of theengine, or by means of steam or air conducted through pipe to a cockoperating means placed below the cylinders and controlled through asuitable *alve in or near the cal). The first of these methods isobjectionable owing, firstly, to the power required to move the severalrods and levers; secondly, because of the wear upon the several jointsof the apparatus; and thirdly, because of the difiiculty of getting themin alinement when more than two cocks are operated by the same lever.The second method is objectionable in that two air or steam conduits arenecessary for its successful operation and in that it is inoperativefrom the cab in the absence of air pressure in the boiler or air tanks.

In my invention I place in or near the cab of the engine an hydrauliccylinder which I furnish with a piston, the rod of which is connectedwith a lever easily reached by the engineer. The hydraulic cylinder isfilled with a liquid, in a cold climate preferably an oil or anon-freezing liquid, and the front of the cylinder communicates with apipe, also filled with the liquid, which leads to cylinders one undereach drain cock of the locomotive cylinder. The cylinders to which thepipe from the first cylinder lead, are furnished with a piston theforward end of which has a cam like form against which rests a stemwhich engages, or is connected to, a valve which is seated in a nippleor conduit, which is placed at right angles to the line of travel of thelatter piston and which is connected with the cylinder to be drained,this valve forming the drain cock of the cylinder.

To open the drain cocks the piston in the hydraulic cylinder is movedforward driving the liquid from this cylinder through the connectingpipe to the second cylinder and causing the piston therein to moveforward, the inclined part, or cam, of which will now pass under andlift the rod or stem which is connected with the drain cock or valve. Assoon as this valve is lifted any water that may be in the end of thelocomotive cylinder to which said cock is connected can pass downthrough the valve and escape.

To close the valve the first piston is drawn back sucking the liquid inits cylinder in the connecting pipe, and in the second cylinder, afterit and returning the piston in the second cylinder and the drain valveto their first position.

In the accompanying drawings a diagrammatic view of my invention isshown.

(1 is an operating lever pivoted at Z) and carrying a detent 0 adaptedto engage with a manner. To the lower end of the lever a is pivotallysecured one end of a rod 0 the other end of which is secured to apistonf carried in a cylinder 9.

To the forward end of the cylinder g is connected a pipe h which leadsto one end of a cylinderi which carries a piston the forward end ofwhich is prolonged and formed with a cam face 7c. The forward end of thecylinder 2' is closed by a plug Z, which is furnished with a perforationm.

n is a spring one end bearing against the forward end of piston and theother against the inner end of plug 1.

0 is a stem or rod placed at right angles to the cylinder-i and formingpart of or engaging a valve p which is seated in a part of the cylimlercasting i. "1 is a nipple or pipe the upper end of which is adapted. tobe screwed into the lower side and at one end of a locomotive cylinder,not shown, and the other end of which is adapted to be secured in anysuitable manner to the cylinder casting i, by a union as shown forinstance.

The cylinder g and the pipe 7b are filled with some liquid, preferablyoil or alcohol.

If it be desired to open the valve p the upnotched segment (Z in a usualand well known per end of lever a is drawn back. This causes the pistonf to move forward in cylinder g and this piston drives before it theliquid in the cylinder which engages the rear end of piston j incylinder 2' causing this piston to move forward and to engage and liftthe stem to open valve p. To close the valve p the movement of the levera is reversed drawing back the piston f which draws after it the liquid,the suction of which, aided by the spring 11 if necessary, returns thepiston to its first position releasing the stem 0 and permitting thevalve to come to a seat.

The perforation m in the plug Z permits the escape of any fluid from theforward end of cylinder i and prevents the formation of a vacuum whichwould prevent the free and quick movement of the piston j as indicatedby the liquid to the back of this piston. The piston j is furnished witha cup packing s and with two packing rings to prevent escape of liquidto the forward end of cylinder i. The piston f is preferably furnishedat both its rear and forward ends with cup packings u.

w is an opening through the side of the casting i through which anywater passing down past valve p may escape.

While my device is designed more particularly for opening the draincocks of locomotive cylinders I do not desire to confine myself solelyto this application of it as it will be obvious that it can be equallywell used for operating other valves or devices of a similar nature. Ifit be used for locomotives there would be employed a cylinder i and.connected parts for operating each drain cock on each cylinder, suitablebranch pipes leading from the main liquid pipe h to each of thesecylinders i. at is a filling plug through which liquid may be introducedto cylinder 9 whenever additional liquid may be necessary.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent.

1. In a valve operating means, in combi nation, a valve, a stem or rodcarried by or engaging said valve, a cylinder the forward end of whichis open to the air, and the rear end of which is closed, a piston,furnished with a cam-like forward. end adapted to engage said rod orstem, carried by said cylinder, a liquid carrying pipe, one end of whichenters the closed end of said cylinder and the other end of which entersan hydraulic cylinder, said latter cylinder, a piston in said latter,cylinder, and means for operating said piston.

*2. In a valve operating means, in combination, a valve, a stem or rodcarried by or engaging said valve, a cylinder the forward end of whichis open to the air and the rear end of which is closed, a pistonfurnished with a cam-like forward end adapted to engage said rod orstem, carried by said cylinder, a spring adapted to normally throw saidpiston backward, a liquid carrying pipe one end of which enters theclosed end of said cylinder and the other end of which enters anhydraulic cylinder and means for operating said piston.

3. In a valve operating means, in combination, a valve, a stem carriedby or engaging said valve, a piston with a cam-like face adapted in itsmovements to engage and operate said stem and valve, a cylinder open atone end and closed at the other for carrying said piston, and means forintroducing and withdrawing a liquid from the closed end of.

said cylinder.

WILLIAM J. MCCARROLL.

W'itnesses:

JAs. H. M. HAYEs, FRED. \VooLLvER.

